window.addEvent('domready', function () {

    $$('a.producto').each(function (el) {
    	var img = el.getElement('img');
    	var url = img.get('src');
        el.addEvent('mouseenter', function () {
        	url = url.replace(/t_/, '');
            $('img-producto').set('src', url);
        });
    });

    $$('a[rel=external]').each(function(link){
	link.set('target', '_blank');
    });

});